Dietary supplements come in a variety of forms, including tablets, capsules, gummies, and powders, as well as drinks and energy bars. Popular supplements include vitamins D and B12; minerals like calcium and iron; herbs such as echinacea and garlic; and products like glucosamine, probiotics, and fish oils.

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Some types of food supplements include antioxidants, vitamins, fats, minerals, and proteins. Recommended types can vary according to what a person's diet might lack. Supplements are also sometimes added to a person's diet because of certain activities they participate in. For example, athletes often require more carbohydrates in their diet because carbohydrates can increase energy.

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